With the way give in Sec. , the coupling constants \(g_{P_{cs}}\)  versus the model parameter \(\Lambda \)  are computed.
Taking a value of the cutoff \(\Lambda =0.9-1.1\)  GeV, the corresponding coupling constants are shown in Fig. REF .
It finds that they decrease slowly with the increase of the \(\Lambda \) , and the coupling constants are almost independent of cutoff
\(\Lambda \)  for the \(J^P=1/2^{-}\)  and \(J^P=3/2^{-}\)  cases, where the \(P_{cs}(4459)\)  is an \(S\) -wave \(\bar{D}^{*}\Xi _c\)  molecular state.
This is consistent with the conclusion in Refs. [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}
that for an \(S\) -wave loosely bound state the effective coupling strength of the bound state to its components is insensitive to its
inner structure. The results also show that the coupling constant for \(J^P=2/3^{-}\)  case is bigger than that for \(J^P=1/2^{-}\)  case.
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